Borislav Petkov (AMD) b35087763a x86/srso: Add a Speculative RAS Overflow mitigation ... Upstream commit: fb3bd914b3 Add a mitigation for the speculative return address stack overflow vulnerability found on AMD processors. The mitigation works by ensuring all RET instructions speculate to a controlled location, similar to how speculation is controlled in the retpoline sequence. To accomplish this, the __x86_return_thunk forces the CPU to mispredict every function return using a 'safe return' sequence. To ensure the safety of this mitigation, the kernel must ensure that the safe return sequence is itself free from attacker interference. In Zen3 and Zen4, this is accomplished by creating a BTB alias between the untraining function srso_untrain_ret_alias() and the safe return function srso_safe_ret_alias() which results in evicting a potentially poisoned BTB entry and using that safe one for all function returns. In older Zen1 and Zen2, this is accomplished using a reinterpretation technique similar to Retbleed one: srso_untrain_ret() and srso_safe_ret(). Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-08-08 19:58:34 +02:00
..
ABI	x86/speculation: Add Gather Data Sampling mitigation	2023-08-08 19:58:32 +02:00
accounting	sched/psi: report zeroes for CPU full at the system level	2022-06-09 10:22:48 +02:00
admin-guide	x86/srso: Add a Speculative RAS Overflow mitigation	2023-08-08 19:58:34 +02:00
arm	Documentation: arm: marvell: Add 88F6825 model into list	2021-08-24 13:26:32 -06:00
arm64	arm64: errata: Add detection for TRBE overwrite in FILL mode	2023-07-23 13:47:48 +02:00
block	Documentation: block: blk-mq: Fix small typo in multi-queue docs	2021-08-24 13:30:00 -06:00
bpf	libbpf: Rename libbpf documentation index file	2021-08-18 08:45:25 -07:00
cdrom	docs: cdrom-standard.rst: get rid of uneeded UTF-8 chars	2021-05-11 11:00:17 -06:00
core-api	Reinstate some of "swiotlb: rework "fix info leak with DMA_FROM_DEVICE""	2022-04-08 14:24:13 +02:00
cpu-freq	cpufreq: Remove ready() callback	2021-09-02 18:04:17 +02:00
crypto
dev-tools	docs/scripts/gdb: add necessary make scripts_gdb step	2023-03-10 09:39:53 +01:00
devicetree	of: overlay: rework overlay apply and remove kfree()s	2023-06-21 15:59:12 +02:00
doc-guide	docs: doc-guide: avoid using ReST :doc:foo markup	2021-06-17 13:24:37 -06:00
driver-api	counter: fix docum. build problems after filename change	2023-04-20 12:13:57 +02:00
fault-injection	debugfs: fix error when writing negative value to atomic_t debugfs file	2022-12-31 13:14:03 +01:00
fb	Documentation: Add leading slash to some paths	2021-03-31 13:49:19 -06:00
features	RISC-V Patches for the 5.15 Merge Window, Part 2	2021-09-11 14:29:42 -07:00
filesystems	fs: Lock moved directories	2023-07-23 13:47:34 +02:00
firmware_class
firmware-guide	Documentation: ACPI: EINJ: Fix obsolete example	2022-08-25 11:40:01 +02:00
fpga	fpga: fix spelling mistakes	2021-07-21 19:54:21 -07:00
gpu	drm/i915/display: Move DRRS code its own file	2022-03-08 19:12:40 +01:00
hid	Documentation: Add leading slash to some paths	2021-03-31 13:49:19 -06:00
hwmon	hwmon: (ftsteutates) Fix scaling of measurements	2023-03-10 09:39:21 +01:00
i2c	Documentation: i2c: add i2c-sysfs into index	2021-08-10 22:58:32 +02:00
ia64
ide
iio	iio: hrtimer: Allow sub Hz granularity	2021-03-25 19:13:49 +00:00
infiniband
input	Input: iforce - add support for Boeder Force Feedback Wheel	2022-09-20 12:39:45 +02:00
isdn
kbuild	Merge branch 'akpm' (patches from Andrew)	2021-09-08 12:55:35 -07:00
kernel-hacking	docs: futex: Fix kernel-doc references after code split-up preparation	2023-04-26 13:51:53 +02:00
leds	Documentation: leds: standartizing LED names	2021-08-20 10:26:24 +02:00
litmus-tests
livepatch	docs: livepatch: Fix a typo and remove the unnecessary gaps in a sentence	2021-03-08 17:25:16 -07:00
locking	Documentation/locking/locktypes: Update migrate_disable() bits.	2021-12-14 10:57:18 +01:00
m68k
maintainer	media: add a subsystem profile documentation	2021-03-22 08:56:42 +01:00
mhi
mips
misc-devices	dw-xdata-pcie: Update outdated info and improve text format	2021-04-14 19:47:28 +02:00
netlabel
networking	xsk: Honor SO_BINDTODEVICE on bind	2023-07-23 13:47:29 +02:00
nios2
nvdimm
openrisc
parisc
PCI	pci-v5.15-changes	2021-09-07 19:13:42 -07:00
pcmcia
power	Documentation: power: include kernel-doc in Energy Model doc	2021-09-07 21:17:28 +02:00
powerpc	powerpc/doc: Fix htmldocs errors	2021-08-27 00:56:34 +10:00
process	overflow: Implement size_t saturating arithmetic helpers	2022-12-31 13:14:33 +01:00
RCU	doc: Update stallwarn.rst with recent changes	2021-07-20 13:36:33 -07:00
riscv	riscv: Move early dtb mapping into the fixmap region	2023-05-01 08:23:24 +09:00
s390	vfio/mdev: Remove CONFIG_VFIO_MDEV_DEVICE	2021-06-21 15:29:25 -06:00
scheduler	This was a reasonably active cycle for documentation; this pull includes:	2021-06-28 16:53:05 -07:00
scsi	scsi: core: Kill message byte	2021-05-31 22:48:24 -04:00
security	This was a reasonably active cycle for documentation; this pull includes:	2021-06-28 16:53:05 -07:00
sh
sound	ALSA: hda/sigmatel: add pin overrides for Intel DP45SG motherboard	2023-04-20 12:13:51 +02:00
sparc
sphinx	docs: Fix the docs build with Sphinx 6.0	2023-01-18 11:48:48 +01:00
sphinx-static
spi	spi: pxa2xx: Update documentation to point out that it's outdated	2021-05-18 14:05:36 +01:00
staging
target
timers	Documentation: drop optional BOMs	2021-05-10 15:17:34 -06:00
trace	tracing/probes: Add symstr type for dynamic events	2023-08-03 10:22:30 +02:00
translations	docs: futex: Fix kernel-doc references after code split-up preparation	2023-04-26 13:51:53 +02:00
tty/device_drivers	serial: 8250: Add proper clock handling for OxSemi PCIe devices	2022-08-17 14:24:23 +02:00
usb	docs: usb: fix malformed table	2021-08-05 12:31:51 +02:00
userspace-api	Remove DECnet support from kernel	2023-06-21 15:59:15 +02:00
virt	KVM: s390: disable migration mode when dirty tracking is disabled	2023-03-10 09:40:01 +01:00
vm	Merge branch 'akpm' (patches from Andrew)	2021-09-08 12:55:35 -07:00
w1	w1: fix build warning in w1_ds2438.rst	2021-05-26 09:11:24 +02:00
watchdog	docs: watchdog: fix obsolete include file reference in pcwd	2021-03-06 17:36:51 -07:00
x86	Another collection of documentation patches, mostly fixes but also includes	2021-09-08 16:28:14 -07:00
xtensa
.gitignore
arch.rst	docs: Group arch-specific documentation under "CPU Architectures"	2021-03-15 13:35:35 -06:00
asm-annotations.rst
atomic_bitops.txt	locking/atomic: Make test_and_*_bit() ordered on failure	2022-08-25 11:39:54 +02:00
atomic_t.txt	Documentation/atomic_t: Document forward progress expectations	2021-08-04 15:16:47 +02:00
Changes
CodingStyle
conf.py	docs/conf.py: Cope with removal of language=None in Sphinx 5.0.0	2022-06-09 10:23:30 +02:00
COPYING-logo
docutils.conf
dontdiff	kbuild: generate Module.symvers only when vmlinux exists	2021-04-25 05:17:02 +09:00
index.rst	docs: Group arch-specific documentation under "CPU Architectures"	2021-03-15 13:35:35 -06:00
Kconfig
logo.gif
Makefile	docs: Makefile: Use CONFIG_SHELL not SHELL	2021-06-18 11:26:08 -06:00
memory-barriers.txt
SubmittingPatches
watch_queue.rst